Intel Xeon E5 2603 v3 's Advantages
Released 3 years and 5 months late
Higher specification of memory (1600 vs 1333)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (85W vs 105W)
Xeon E7 2803 's Advantages
Higher base frequency (1.733GHz vs 1.6GHz)
Larger L3 cache size (18MB vs 15MB)